A classical problem of Stanislaw Ulam in the theory of functional equa... - dofaq.co
cauchy–rassias stability

A classical problem of Stanislaw Ulam in the theory of functional equa...

wikipedia - 09 Jul 2015
A classical problem of Stanislaw Ulam in the theory of functional equations is the following: When is it true that a function which approximately satisfies a functional equation E must be close to an exact solution of E? In 1941, Donald H. Hyers gave a partial affirmative answer to this question in the context of Banach spaces. This was the first significant breakthrough and a step towards more studies in this domain of research. Since then, a large number of papers have been published in conn

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